Water gauge and temperature indicator



F. A. MARS H WATER GAUGE AND TEMPERATURE INDICATOR June 1 1926.

Filed Oct. 5, 1923 firmerifi Q Wkrafi.

Patented June 1, 1926.

5;; m We N ef FREDERICK A. IYIARSII, O1 COLUMBUS, OHIO.

WATER GAUGE AND TEMPERATURE INDIGATOR.

Application filed October 3, 1923.

once or" water in the tube, and in so design ing and arranging the float, tube and thermometer as to provide a simple and unitary structure which may be readily attached to the ordinary automobile cap. c

Other objects and advantages of the invention will be apparent from the followi21 description when taken in connection with the accompanying drawings, in which Figure 1 is a front elevation of the device partly in section.

Figure 2 is a vertical section taken on line 22 of Figure 1.

Figure 3 is a horizontal section taken on line 33 of Figure 2.

Figure l is a sectional view of a portion of a radiator, and,

Figure 5 is a cross section of a detail.

teilerring to the drawings more in detail, the numeral 1 indicates a radiator cap or usual construction which is centrally perforated tor the reception of the enteriorly threaded metal nipple 2. This nipple is formed with a flange 3 for engagement with the upper surface of the cap, and is locked in eng "3,Q131311't therewith by means of the washer 4i and nut 5.

Seated in the upper end or the metal nipple 2 is a transparent tube 6, preferably oi Tube 6 is narrowed in its upper portion and this narrowed portion is indicated by numeral 7. In order that the tube 6 may be connected liquid tight to the nipple 2, an upwardly-entending flange 8 is provided in which the lower endot the tube is seated. Suitable packing 9 is positioned around the tube 6 and clamped in place by means of the packing nut 10.

Extending concentrically through the top of the enlarged portion of tube 6 is a thermometer 11 which is welded or otherwise secured. therein. Surrounding the lower or enclosed end of the thermometer is an annu- Serial No. 666,380.

er float 12 for visually indicating the presice '1 water in the tube 6.

O: in substantially triangular frame 13 is rigidly connected to the packing nut 10 and is provided with front and rear panels 1% and oi beveled glass or the like. These panels are held iii place by means of the clamps 16 which are fastened to the frame through the medium of screws 1?. Dust iioojt' washers l8 are preferably interposed betwc the clamps 16 and the glass panels, while several perforations 19 may lie pro- \"ided in the trame for permitting a ci rcu lation of air.

A. startling box 20 which is centrally located in the upper end of the frame 13 receives the upper end of the tube 7, and is if provided with a nipple 21 threaded thereto. Between the nipple 2i and the stuffing box 20 a flexible bulb 22, of rubber or the like, is clamped.

In order to cause a proper discharge of water from the nipple 2, where a very small bore is employed, it is necessary to overcome the capillary attraction thereof, and to this end I have provided a wick 23 (Figure 5)- which may be secured within the lower end 0 of the nipple by pinching the walls against the wick as indicated by numeral 24.

Electric bulbs may be located in the base of the frame 18 for displaying the night if desired. in the operation of the device the cap 1. removed from the radiator and the latter filled with water in the usual way. The cap then being replaced the bulb 22 is squeezed so to drive a portion of the air from the tubes (3, T and nipple Atmospheric pres sure will then force water into the tube 6 and raise the float 12 to a position where it may be seen by the driver, as disclosed in Figures 1 and oi' the drawings. T he water in the tube ('3 willof course contact the thermometer 11 which will therefore accurately indicate the temperature of the radiator. lndicia may be placed on the front panel 14- or tube (3, if desired, in order to indicate the height of the float in the tube. It may be here stated that the cubic content of the bulb 22 is suc i as to expel only a part or the air in the tube 6 as it is not desired to draw ater into the narrowed portion 7 thereof. In Figure & of the drawings I have shown (ill roe

a construction in which the tubing of the radiator is provided with a recess A at the center of its upper surface in order that the water tube 13 may extend lower than would be permitted in the ordinary type of radiator; the purpose being to prevent the lower end of the tube becoming uncovered when only a small portion of the water is evaporated from the radiator, thereby ing the signal to reiill much earlier than is necessary.

From the foregoing description it will be seen that i have provided a very simple and compact construction by which the temperature of the radiator is accurately determined and by which the time for refilling is promptly indicated. Furthern'iore, the present construction provides an extremely simple arrangement for initially placing the water in the tube (3.

In accordance with the patent statutes I have described what I now believe to be the best embodiment of the invention, but I do not wish to be understood thereby as limiting myself or the scope of the invention, as many changes and modifications may be made without departing from the spirit of the invention; all such I aim to include in the scope of the appended claims.

it" I claim as new and desire to secure by Letters latentisl. The combination with a radiator cap, of a transparent tube or substantial internal diameter throughout its length mounted therein at a point above the water in the radiator, a conduit leading from said tube to a point below the normal water line oi the radiator, a thermometer partly within said tube, a heat in said tube, and means tor causing water to rise in said tube into i.

g; gement with the float and thermometer.

The combination with a radiator cap, a casing mounted thereon, transparent panels in the trout and rear of said casing, and a transparent tube of substantial internal diameter throughout its length in said casing extending from end to end thereof and nor mally having connection with the water in the radiator, a float and thermometer concentrically mounted in said tube, and means tor drawing water into the tube.

FEEDER (1-K A. MARSH. 

